The Sun is actually white, not yellow.

The Sun is a G-type main-sequence star that emits light across the entire visible spectrum. When all these colors are combined, they appear as pure white to the human eye. This is clearly visible in photographs taken by astronauts on the International Space Station, where the lack of an atmosphere reveals the Sun's true color.The yellow appearance we see on Earth is caused by Rayleigh scattering, a phenomenon named after the British physicist Lord Rayleigh in the 19th century. As sunlight enters our atmosphere, it collides with gas molecules and scatters shorter wavelengths of light, specifically blue and violet. This scattering is also why the sky appears blue during the day.Because the blue light is removed from the direct beam of sunlight, the remaining light appears shifted toward the warmer end of the spectrum. This results in the yellow, orange, or even deep red hues we observe during sunrise and sunset. At these times, the light must travel through a much thicker layer of the atmosphere, increasing the scattering effect.While astronomers formally classify the Sun as a 'yellow dwarf' or G2V star, this label refers to its spectral type and surface temperature of about 5,778 Kelvin rather than its literal color. If you were to view the Sun from a vacuum without any atmospheric interference, it would look like a glowing white orb. Understanding this distinction helps scientists accurately measure the chemical composition and temperature of distant stars.